[Alex.]

Are these titles worth renting/buying? Are they like SM64 or Sunshine? I must know!

[Ness2.0]

Well to me Galaxy is acctually pretty fun. Its kidna like a mix of the both with FLUDD'S appearing in a lot of places (But you don't get to use them :( ) and then there the challenges creative and fun level design and just fun 3D plattforming. I would definitely buy it.
* Note I have not beat Galaxy 2 but this is what I have been able to tell from hands on.
Galaxy 2 on the other hand I hated it. It was in my opinion very boring. I mean I only got to world 3 but I still found it very boring. They tried to make a very bad combination in my opinion (Galaxy and Super Mario Bros). The levels are pretty dull (To me), the power ups aren't much. The hub world and how you get from world to word is just stupid. I mean I like not having to travel way out of my way to get to a place but it's a 3D platformer so it's alright. And because of the way they have it set up there aren't many levels per world. Also the levels are easy. VERY EASY! I mean there's some challenge but not much. But once again I have not beat this game so all this might not be completely valid. Also it's based on personal opinion. So If anything
I guess simply put Galaxy is like MW2 and Galaxy 2 is like MW3.
But that's my opinon sorry. I like to rant.

Simply put I would definitely but Galaxy and rent Galaxy 2 just to see how you like it. Or just rent both and see how you like them.